51263952251 has 8 divisors (see below), whose sum is σ = 55746492480. Its totient is φ = 46944413568.

The previous prime is 51263952227. The next prime is 51263952263. The reversal of 51263952251 is 15225936215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51263952251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51263952199 and 51263952208.

It is not an unprimeable number, because it can be changed into a prime (51263952211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40749731 + ... + 40750988.

It is an arithmetic number, because the mean of its divisors is an integer number (6968311560).

Almost surely, 2^51263952251 is an apocalyptic number.

51263952251 is a deficient number, since it is larger than the sum of its proper divisors (4482540229).

51263952251 is a wasteful number, since it uses less digits than its factorization.

51263952251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81500773.

The product of its digits is 162000, while the sum is 41.

The spelling of 51263952251 in words is "fifty-one billion, two hundred sixty-three million, nine hundred fifty-two thousand, two hundred fifty-one".